1、-. - _ . - . MIL-F-8I89A 58 7999706 0332433 I I! Cmnents or recomnendations which may be of use in improving this document may be sent to the preparing activity when a self- addressed standardizatisn document Improvement proposal (DD Form 1426) appears at the end of this document, or by letter f MIL
2、-F-81898A( AS) 11 April 1979 MILITARY SPECIFICATION FORWARD LOOKING RADAR SET, AN/APQ-126 (V) This specification has been approvedby the Naval Air Systems Cmand Department of .the Navy. 1. SCOPE 1 - SCOPE - This specification covers the design, per- formance, and test requirements for a forward look
3、ing radar set which shall provide the following functions: . 1.1 Terrain foliowing computations (TF) Terrain avoi dance (TA) Ground mapping (shaped beam) (GMS) Ground mapping (pencil beam) (GMP) Air-to-ground ranging (AGR) Beacon i nterrogate and receive (BCN) Walleye television display (TV Display)
4、 Shrike Improved Displ ay System (SIDS) Radar navigation updating (CMPTR) Radar bombing (RDR BOMB) These functions, as provided, shall be compatible with the flight and control characterisflcsl of the A-7D/E airplane, a high performance light attack air- plane with all weather navigation, target acq
5、uisition, and weapon delivery capabil itiesi. These additional functions are available when the radar set is confi ured with an Indi cator IP-1256/APQ-126 (V) and Convertor CV-3368/APQ-126 9V) : Forward Looking Infrared (FLIR) display (when the necessary input signals are provided). L FSC 5841 THIS
6、DOCUMENT CONTAINS !? 7 PAGES. Licensed by Information Handling ServicesMIL-F-81898A( AS) Expanded map display (EXPAND) (when used in con- junction with an appropriately modified Power Supply Programer PP-6130/APQ-126 (V) ) . Frozen map display (HOLD). cons 1.2 Classification - The Radar Set, AN/APQ-
7、l26(V), shall st of the following items: Item Power Supply - Progr-er, (P/O Fwd Ass y Grp) . Antenna Scan Transmitter , Radar (P/O Fwd Assy Grp) Antenna-Receiver (P/O Fwd Assy Grp) Computer, Air Navi ation (P/O Fwd Assy Grp 3 Control, Radar Set (Red Li ght i ng ) OR Control, Radar Set (White Lightin
8、g) (P/O Cockpit Grp) Generator, Sweep (P/O Cockpit Grp) OR Convertor, Signal Data (P/O Cockpit Grp) Fault Locator, Radar Set (P/O Cockpit Grp) Indicator, Multiple, .Air . Navigation (Red Lalght-ing) OR Indicator, Multiple, Air Navigation (White Light i ng) (P/O Cockpit Grp) OR Indicator, Intra Targe
9、t Data, FWD (Red Lighting) (P/O Cockpit Grp) Type Designation PP-6130/APQ-126 ( V) T-1091/APQ-126 (V) AS-2272/APQ-126 (V) CP-954/APQ-126 (V) C-8251/APQ-126( V) C-8252/APQ-126 (V) SG-811/APQ-126 (V) CV-3386/APQ-126 (V) MX-8195/APQ-126 (V) IP-940/APQ-126( V) IP-952/APQ-126( V) IP-1256/APQ-126( V) Appl
10、icable Paragraph 3.5.1 3.5.2 3.5.3 3.5.4 3.5.5 3.5.5 3.5.7 3.5.12 3.5.8 3.5.9 3.5.9 3.5.13 2 Licensed by Information Handling Services. 1 -. -. - MIL-F-387A 58 m 9797906 0372435 5 m MI L-F-81898A( AS) Applicable Item Type Designation Paragraph Control, Radar Set (Red Lighting) C-8253/APQ-126 (V) 3.5
11、.6 OR Control, Radar Set (Instrument Panel Mount- White Lighting) C-8255/APQ-126 (V) 3.5.6 (P/O Cockpit Grp) Base, Shock Mount, Electrical Equipment MT-4043/APQ-126 (V) 3.5.10 (P/O Fwd Assy Grp) Fan, Centrifugal HD-821A 3.5.11 (P/O Fwd Assy Grp) with the associated equipment listed in 6.6. 2. APPLIC
12、ABLE DOCUMENTS 1.3 Associated Equipment - This radar set shall operate . 2.1 this specification to the extent specified herein. the documents in effect for the previous procut-ement. the issue listed, the contractor shall use the latest issue in effect of these documents where feasible. If the use o
13、f the latest issue will affect design performance, or interchangeability of any replaceable part, then the issue of the document listed below shall be used. General - The following documents form a part of Listed are the issues of However, in lieu of SPECIFICATIONS Mi 1 i tary MIL-T-27 MIL-W-50886-1
14、 Transformers and Inductors (Audio, Power, and High Power Pulse); General Specification for Wiring Aircraft, General Speci- fication for MIL-E-5400F(ASG)-l . Electronics Equipment, Aircraft, General Specification for MIL-T-5422E(ASG)-2 Testing, Environmental, Aircraft Electron ic Equipment 3 License
15、d by Information Handling ServicesMIL-F-81898A( AS) MIL-I-618ID MI L-C-6781 B ( ASG ) . . MI-D-18300B-1 . MIL-N-18307 . MI L-E-19600A MIL-T-ZZOOD(ASG) -1 MIL-1-23524 M IL-A- 23887 MIL-C-38999 Other AS-1720 WS3180A XWS-65 17 STANDARDS M i 1 i t ary MI L - STD- 129C Interference Control Requirements,
16、Aeronautical Equipment Control Panel : Aircraft Equipment, Rack or Consol e Mounted Meter, Time Totalizing, 380-420 Hz, General Specification for Design Data Requirements for Contracts Covering Airborne Nomencl ature and Namepl ates for Aeranau t i cal Electron i c and Associated Equipment Electroni
17、c Equipment Electronic Modules, General Aircraft Requirements for Test Equipment for use with Electronic and Fire-Control . Systems, General Specification for Indicator, Altitude-Director, Remote Al timeter, Radar AN/APN-141 Connectors, Electrical, Miniature, Quick Disconnect with Removable. Crimp T
18、ype Contacts (for Special Weapons System Circuitry), Estab- 1 is hed Re1 i abi 1 i ty Convertor, Signal Conditioner Detai 1 Spec if icat ion, Gui dance Section, Guided Weapon, MK 27 Mod O Convertor, Signal Conditioner . Marking for Shipment and Storage 4 Licensed by Information Handling ServicesM IL
19、-STD- 14 3A MIL-STD-21OA MI L-STD-449B MIL-STD-470 L M IL-STD-480 MIL-STD-704 MI L-F-81898A( AS) Specifications and Standards, Order of Precedence for the Selection of Equ i prnen t C1 imat i c Extremes for Mi 1 i tary Equ i ment Radio Frequency Spectrum Character- istics, Measurement of Maintainabi
20、lity Program Requirements (For Systems and Equipment) Configuration Control - Engineering Changes, Deviations and Waivers Electric Power, Aircraft, Character- istics and Utilization of MI L-STD-756A Re1 i abi 1 ity Prediction MIL-STD-781A c MIL-STD-785 MIL-STD-794 MIL-STD-810 Re1 i abi 1 i ty Tests,
21、 Exponenti al Di stri but i on Re1 i abi 1 i ty Program for System and Equipment Development and Production Parts and Equipment Procedures for Packaging and Packing of Environmental Test Methods for Aerospace and Ground Equipment Electronic Industries Association EI A-RS-343A High Resolution Monochr
22、ome Closed Circuit Television Camera, Electrical Performance Standards for Vouqht Systems Division 204-20-21A Digital Scan Converter for TA-7C Airplanes, Procurement Speci f i cat i on for PUBLICATIONS Mi 1 i tar y MIL-HDBK-217A Re1 i abi 1 i ty Stress and Fai lure Rate Data for Electrical Equipment
23、 Licensed by Information Handling ServicesMIL -F-81898A( AS) 2.1.1 Precedence of Specifications - Where the require- ments of this procurement specification and those of any other applicable specifications differ, the requirements of this procurement specification shall govern. order of precedence e
24、stablished by MIL-STD-143. cation or any specification applicable to the equipment procured hereunder are not authorized without prior written approval of NAVAIR. In all other instances, publications shall be used in the 2.1.2 Deviations - Deviations to this procurement specifi- 2.1.3 Availability o
25、f Documents - When requesting . specifications, standards, and publications, refer to both title. and number. Copies of t hi s - spec if i cat i on and appl i cab1 e- specif i cat i ons required by contractors in connection with specific procurement functions may be obtained upon application to the
26、Comnanding Officer, Publications and Forms Center, Code 105, 5801 Tabor Avenue, Philadelphia, Pennsylvania 19120. 2.1.3.1 Avai 1 abi 1 i ty of Electron i c Industries Assoc i at i on Documents - Application for copies should be addressed to the Electronic Industries Association, 2001 Eye Street, N.W
27、., Washington, DC 20006, 2.1.3.2 Availability of Vought Systems Division Documents - Application for copies should be addressed to the Vomystems Division, LTV Aerospace Corporation, P. O. Box 5907, Dallas, Texas 75222. 3. REQUIREMENTS 3.1 Preproduction - This specification makes provision for prepro
28、duction testing. . 3.2 materials, fulfillment of major design objectives shall be the prime consideration. Parts and Materials - In the selection of parts and In so doing, the following shall govern: a. Microelectronic technology shall be considered and microelectronic items shall conform to require
29、ments spec if i ed herein. b. Other parts and materials requirements shall conform to Specification MIL-E-5400 for Class 2, Category III equipment. Nonrepairable subassemblies, as outlined in Specification MIL-E-5400 for Class 2, Category III equipment, shall be used when practicable. The general si
30、ze of the subassembly and the shall be approved by the procuring activity. Nonrepairable subassemblies shall be reliable. c. . amount of circuitry to be included therein 6 . . .- _. Licensed by Information Handling Services7999906 O172 Y17 2 MIL-F-81898A( AS) d. When previously produced models of th
31、is radar set did not use nonrepairable subassemblies, the design shall not be changed to employ non- repairable assemblies without the approval of the procuring activity. 3.2.1 Nonstandard Parts and Materials Approval - Approval for the use of nonstandard parts and materials (including electron tube
32、s, transistors , and diodes) other than microelectronic devices shall be obtained as outlined in Specification MIL-E-5400 for Class 2, Category III equipment. . 3.2.2 Microelectronic Modular Assemblies - Not applicable. 3.2.3 Modules - The use of modular space assignment, and the construction of plu
33、g-wssemblies is encouraged in the design of equipment specified herein. Small groups of subassemblies may constitute a larger subassembly where necessity dictates the use of comnon pressurization, cooling or shielding. The use of potted or sealed repairable subassemblies which causes difficulty in p
34、art replacement shall require prior approval. Subassemblies shall be designed in accordance with MIL-E-19600 excluding the dimensi on requirements. The subassembly dimensions and power supply require- ments shall be as best suited for the application. keyed to prevent inadvertent misinstall ation. c
35、onform with all the applicable requirements of Specification MIL-E-5400 for Class 2, Category III equipment for design, construction, and workmanship except as otherwise specified herein. . Subassemblies shall be 3.3 Design and Construction - The equipment shall 3.3.1 Total Weight - The total weight
36、 of the radar set, excluding cables, shall be a minimum consistent with good design and shall not exceed 239.5 pounds (108.6 kg). 3.3.2 Reliability - The contractor shall conduct a reliability program in accordance with MIL-STD-785. On a reorder from a contractor who .has previously produced the equ
37、ipment, the program previously used may be continued unless otherwise indicated in the contract or order. Operational Stability - The radar set shall operate with satisfactory performance, continuously, or intermittently for a period of at least 100 hours when operated in a temperature.environment n
38、ot exceeding that specified in paragraph 3.3.10.2 without the necessity for readjustment of any controls which are inaccessible to the operator during normal use. Operating Life - The radar set shall have a minimum total operating life of 4000 hours with reasonable servicing and replacement of parts
39、. Parts requiring scheduled replacement shall be specified by the contractor . 3.3.2.1 3.3.2.2 - _. f 7 Licensed by Information Handling Services. . , MIL-F-81898A( AS) 3.3.2.3 Storage - The equipment shall be designed to operate satisfactorily after five years storage and transit in accordance with
40、 MIL-STD-210 3.3.2.4 Reliability in Mean Time Between Failure (MTBF) - The eauiment shall demonstrate a specified MTBF of 106 hours when tested in accordance with paragraph 4.4 herein. The equipment reliability shall not be degraded below the required level as a result of normal field usage and main
41、tenance. 3.3.2.5 Time Totalizing Meter - The following units shall contain time total izing meters in accordance with Specification MIL-M-7793. Meter - Unit - Antenna - Receiver MS17322-6A Power Supply-Programer, Antenna Scan MS17322-6A Computer, Air- Navigation MS17322-6A Transmitter , Radar MS1732
42、2-4 Indicator, Multiple, Air Navigation MS17322-6A Sweep Generator MS17322-6A Indi cator, Intra Target Data, FWD MS-17322-10 Convertor, Signal Data MS-17322-10 3.3.3 Cablinq and Connections - 3.3.3.1 Connectors - Except for those connectors used on the forward radar assembly, all connectors of the r
43、adar system used for testing purposes or interconnection between units of the radar or other aircraft systems shall be in accordance with MIL-C-38999 or as otherwise approved by the procuring activity. 3.3.3.2 Interconnection Cabling - The radar set shall be capable of satisfactory operation using e
44、xternal wiring in accordance with the applicable requirements of MIL-W-588. The externl wiring shall be un- shielded, except that a minimum number of the individua? wires may be shielded when demonstrated as necessary to meet interference control requirements and provided the assembly of the cable t
45、o its plugs may be easily accomplished. External cables and that portion of the connectors attached to the cables shall not be supplied as part of the equipment. 8 Licensed by Information Handling ServicesI- . MIL-F-81898A( AS) 3.3.4 Control Panels - All rack or console mounted control panels shall
46、conform to the applicable requirements of Specification MIL-C- 6781, Type 1. The configuration of all panels must be approved by the proc- uring activity prior to preproduction testing. interchangeability requirements of Specification MIL-E-5400. interference by the radar set and the vulnerability o
47、f the radar set to radio interference shall meet the requirements of Specification MIL-1-6181. 3.3.5 3.3.6 Interference Control - The generation of radio Interchangeability - The radar set shall meet the . 3.3.7 Provisions for Maintainability - The basic radar set design shall comply with all applic
48、able portions of MIL-STD-470. The equip- ment shall be designed so that standard tools and test equipment may be used to the greatest possible extent to accomplish all necessary adjustments, maintenance, and testing. A proposed list and required information for standard and special tools and test eq
49、uipment shall be submitted to NAVAIR for approval. 3.3.7.1 Maintainability Requirement - Field (intermediate) level maintenance shall not exceed 3.0 direct man-hours mean time to repair (MTTR) per malfunction. No more than 12.0 man-hours of direct time shall be required to repair any single failure. Preventive maintenance shall require no more than 6.0 man-hours direct time to accomplish and shall not be required more often than an interval of 500 flight hours. be computed on the basis of accomplishment by maintenance personnel equiv- alent to Air Force skill
